For your extra £4k you get the same 4.4 litre V8 as the regular M3 but the Competition Pack gets bolted on. That means a a drop of 10mm on the suspension, an extra setting on the dampers, tweaks to the DSC+ and 7-speed M-DCT ‘box, all of which gives sharper handling and a 0.2 second edge on the 0-62mph sprint.